Increase in ICMP scans
Over the last few hours, sensors detected a remarkable increase in ICMP
traffic. At this point, we assume that the traffic is linked to the
'Nachi' worm: http://vil.nai.com/vil/content/v_100559.htm
The worm is also known as 'Welchia' (
http://securityresponse.symantec.com/avcenter/venc/data/w32.welchia.worm.html )
While the investigation is still in progress, we did identify so far the following characteristics:
- some of the traffic is spoofed
- the data content is all '170' (0xAA)
- ICMP echo requests (type 8, code 0)
Source-Target correlation fingerprints
ICMP Data: http://isc.sans.org/images/icmpfp.png
all Data: http://isc.sans.org/images/allfp.png
port 135: http://isc.sans.org/images/port135fp.png
Sample Packet
(target IP obfuscated)
Snort identifies these packets as "ICMP PING CyberKit 2.2 Windows".
traffic. At this point, we assume that the traffic is linked to the
'Nachi' worm: http://vil.nai.com/vil/content/v_100559.htm
The worm is also known as 'Welchia' (
http://securityresponse.symantec.com/avcenter/venc/data/w32.welchia.worm.html )
While the investigation is still in progress, we did identify so far the following characteristics:
- some of the traffic is spoofed
- the data content is all '170' (0xAA)
- ICMP echo requests (type 8, code 0)
Source-Target correlation fingerprints
ICMP Data: http://isc.sans.org/images/icmpfp.png
all Data: http://isc.sans.org/images/allfp.png
port 135: http://isc.sans.org/images/port135fp.png
Sample Packet
(target IP obfuscated)
0x0000 4500 005c 2dc8 0000 7901 66a6 4349 919e E..\-...y.f.CI..
0x0010 xxxx xxxx 0800 3318 0200 6d92 aaaa aaaa ......3...m.....
0x0020 aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa ................
0x0030 aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa ................
0x0040 aaaa aaaa aaaa aaaa aaaa aaaa aaaa aaaa ................
0x0050 aaaa aaaa aaaa aaaa aaaa aaaa ............
Snort identifies these packets as "ICMP PING CyberKit 2.2 Windows".
Keywords:
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<a hreaf="https://technolytical.com/">the social network</a> is described as follows because they respect your privacy and keep your data secure. The social networks are not interested in collecting data about you. They don't care about what you're doing, or what you like. They don't want to know who you talk to, or where you go.
<a hreaf="https://technolytical.com/">the social network</a> is not interested in collecting data about you. They don't care about what you're doing, or what you like. They don't want to know who you talk to, or where you go. The social networks only collect the minimum amount of information required for the service that they provide. Your personal information is kept private, and is never shared with other companies without your permission
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